To enable an engine to instantaneously and effectively stop while an operator, which grips a handle lever with both hands and operates a control machine, rapidly and readily operates with foot in an emergency.

In a control machine having a handle lever 1 and a rotary operating machine B in the rear of a machine body and carrying an engine E in the front of the machine body, a operating body 3 capable of being rotated by foot of a operator is installed behind the rotary operating machine B and a detector 2 for detecting that the operating body 3 is rotated by outer force is installed above the rotary operating machine B and the detector is interlocked with an engine stopping mechanism.